Quantization of interface currents
Quantization of interface currents
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DOI：
10.1063/1.4902377
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发表时间：
2014-12-01
影响因子：
1.3
通讯作者：
Villegas-Blas, Carlos
中科院分区：
文献类型：
--
作者：
Kotani, Motoko;Schulz-Baldes, Hermann;Villegas-Blas, Carlos
在两个二维量子系统的界面处，可能存在与量子霍尔系统中边缘电流相似的界面电流。证明了这些界面电流是由两个系统的陈恩数之差给出的整数宏观量子化的。本文还讨论了两个具有半整数自旋的系统（一个是平凡的，另一个是非平凡的）的界面上存在无耗散自旋极化界面电流。(C) 2014 AIP出版有限责任公司
At the interface of two two-dimensional quantum systems, there may exist interface currents similar to edge currents in quantum Hall systems. It is proved that these interface currents are macroscopically quantized by an integer that is given by the difference of the Chern numbers of the two systems. It is also argued that at the interface between two time-reversal invariant systems with half-integer spin, one of which is trivial and the other non-trivial, there are dissipationless spin-polarized interface currents. (C) 2014 AIP Publishing LLC.